diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c index 8c76400ba631..aa8ba4cdfe34 100644 --- a/fs/f2fs/compress.c +++ b/fs/f2fs/compress.c @@ -1491,10 +1491,10 @@ void f2fs_compress_write_end_io(struct bio *bio, struct folio *folio) f2fs_compress_free_page(page); - dec_page_count(sbi, type); - - if (atomic_dec_return(&cic->pending_pages)) + if (atomic_dec_return(&cic->pending_pages)) { + dec_page_count(sbi, type); return; + } for (i = 0; i < cic->nr_rpages; i++) { WARN_ON(!cic->rpages[i]); @@ -1504,6 +1504,14 @@ void f2fs_compress_write_end_io(struct bio *bio, struct folio *folio) page_array_free(sbi, cic->rpages, cic->nr_rpages); kmem_cache_free(cic_entry_slab, cic); + + /* + * Make sure dec_page_count() is the last access to sbi. + * Once it drops the F2FS_WB_CP_DATA counter to zero, the + * unmount thread can proceed to destroy sbi and + * sbi->page_array_slab. + */ + dec_page_count(sbi, type); } static int f2fs_write_raw_pages(struct compress_ctx *cc,